package com.laizhenghua.gateway.gatewayFilter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @description: 自定义的 GatewayFilter 主要实现功能全局日志记录
 * @date: 2022/2/19 20:23
 */
@Slf4j
@Component
public class LogGatewayFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("come in LogGatewayFilter -> " + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
        String username = exchange.getRequest().getQueryParams().getFirst("username");
        if (username == null) {
            log.info("username is null");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();
        }
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
